In the network economy, success is self-reinforcing; it obeys the law of increasing returns. The great innovation of Silicon Valley is not the wowie-zowie hardware and software it has invented. Silicon Valley's greatest "product" is the social organisation of its companies, and most important, the tangled web of former jobs, intimate colleagues, information leakage from one firm to the next, rapid company life cycles, and agile e mail culture. This social web, suffused into the warm hardware of jelly bean chips and copper neurons, creates a network economy.